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Quantitative analysis of microplastics from marine areas of Zadar and Šibenik
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Researchers sampled surface seawater at sites near Zadar and Sibenik on the Croatian Adriatic coast and found an average microplastic concentration of 0.80 particles per cubic meter. Fibers were the most common form, consistent with findings from other global coastal studies, with secondary microplastics from wastewater discharge and fishing activities as likely sources.
Mikroplastika predstavlja rastući oblik onečišćenja koji se proširio prirodnim staništima i do najizoliranijih područja, što je prouzročeno brojnošću potencijalnih izvorišta i karakteristikama čestica koje omogućuju njihovo širenje okolišem na brojne načine. Uz to, sve veći broj terenskih i laboratorijskih istraživanja pruža uvid u štetne učinke plastičnih mikro čestica na prirodna staništa te organizme i naposljetku čitave zajednice koje ih nastanjuju. Cilj ovog istraživanja bio je provođenje kvantitativne analize mikroplastike iz površinskog sloja mora na području gradova Zadra i Šibenika, uporabom mreže otvora 300 µm. Rezultati laboratorijskih analiza su pokazali da je prosječna koncentracija mikroplastike u moru gradskih sredina iznosila 0,80 čestica/m³. S obzirom na fizičke karakteristike, najzastupljenije čestice bile su u obliku vlakana (51%), a zatim fragmenti (33%), dimenzijskog raspona ispod jednog milimetra (51,7%), i to prozirne (48%) i plave boje (16%), što opisom odgovara najzastupljenijim česticama u istraživanjima iz različitih dijelova svijeta. Vlaknasta struktura i fragmentiranost obilježja su sekundarne mikroplastike, a njena predominacija sugerira da su glavni izvori podmorski ispusti otpadnih voda, raspad odbačenog otpada, ribolovne aktivnosti i transport čestica s gradskih površina vjetrom ili odljevnim vodama. Korištene metode pokazale su se adekvatnima i pristupačnima za uzorkovanje, međutim, uz prostor za napredak kroz implementaciju preciznijih metoda te češće uzorkovanje na duži vremenski period za potpuniji uvid u prostorno vremenske fluktuacije mikroplastike u morskim ekosustavima.
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Researchers assessed microplastic contamination in surface water of the Krka River estuary in Croatia, characterizing the abundance, morphology, size, and polymer types of particles found in this Adriatic coastal ecosystem. The study provides baseline data on microplastic distribution in a Mediterranean estuary and identifies likely sources contributing to the observed pollution.
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Floating and seabed macro- and micro-litter in the Croatian middle Adriatic Sea were simultaneously surveyed, finding average floating micro-litter concentrations of 127,000 particles per square kilometer and seabed micro-litter of 36 particles per 100 g dry weight. The study confirms that plastic pollution is widespread at all depths in this semi-enclosed Mediterranean sea.
Microplastics in the Marine Environment of the Adriatic
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This Croatian-language review summarizes research on microplastics in the Adriatic Sea environment, covering their sources, distribution in water and sediments, and documented effects on marine organisms. The authors highlight how toxic compounds adsorbed onto microplastics transfer through food chains and eventually reach humans. The review synthesizes the state of knowledge on Adriatic microplastic pollution for a Croatian-speaking audience.
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This is the first study to document microplastics in surface sediments along the coast of Montenegro in the Adriatic Sea. Fibers and fragments were the dominant types found, highlighting that microplastic contamination has reached this less-studied part of the Mediterranean.
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